Xiaomi Yi is among the most attractive action cameras for consumers on a budget. For just under $80, you get pretty much everything you could hope for. The only thing that is missing is 4K support, which is now starting to show up in more and more devices in this segment. Its successor, however, addresses this shortcoming. Yi Technologies, the company behind Xiaomi Yi, has officially announced the second-generation of its action camera, called Yi 2. It packs a new chip, formally known as Ambarella A9, that enables 4K video recording at up to 30 FPS and 1080p video recording at up to 120 FPS. Yi 2 is equipped with a 12.35 MP, Sony-made, Exmor IMX206 sensor. The seven-layer lens has an f/2.8 aperture. Yi 2 also boasts an integrated LCD display on the back. It is a 2.19-inch screen with a resolution of 640 by 360, which gives it a pixel density of 335 pixels per inch. If these specs sound familiar that's because they match those of GoPro's Hero 4 Black E...